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T.I Building is a trusted extension builder serving customers in Hillsborough and the surrounding area. Contact us to today to get a competitive qu...
Need to find an Extension Builder near you for all your extension buildering work?
Mount Oriel Conversions & Extensions provides a local, t...
From £9,384
Relax... you have found a reliable extension builder in Hillsborough. Finch Construction NI is a friendly and reliable company based in Hillsboroug...

Garden offices range from the cheapest of £9,136 (Mount Oriel Conversions & Extensions based in BT8) to the dearest of £9,400 (T.I Building based in BT28), but these are only estimates.
The best way to compare costs is to get actual quotes.
Get rates and quotes to build a garden office in Hillsborough by posting a job with HaMuch. We'll send it to extension builders in Hillsborough.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Garden Office near Hillsborough and Culcavy | £25 | £170 |
| Garden Office near Lisburn | £24 | £164 |
| Garden Office near Maghaberry | £31 | £205 |
| Garden Office near Ballynahinch | £19 | £189 |
| Garden Office near Carryduff | £23 | £158 |
| Garden Office near Saintfield | £23 | £162 |
| Garden Office near Waringstown | £23 | £167 |
| Garden Office near Banbridge | £29 | £205 |
| Garden Office near Belfast | £23 | £161 |
| Garden Office near Crumlin | £26 | £194 |
Whether you’re looking to extend your kitchen with a side return extension or you want to convert your basement into a liveable space, read our cost guides to get an idea of how much each project costs before getting a more accurate quote from our database of reliable tradespeople.

Underpin a building - £16,807

Two storey extension - £86,960

Build a timber frame extension - £25,307

Build a swimming pool - £80,307

Single storey extension - £41,133

Side return extension - £33,700

Install an RSJ - £1,507

Outbuilding - £9,307

Build a Mansard loft conversion - £51,307

Loft conversion - £27,250

Build a kitchen extension - £41,307

Hip to gable loft conversion - £41,307

Granny annexe - £86,307

Garden office - £9,307

Convert a Garage - £15,307

Garage - £17,807

Build a flat roof extension - £21,307

Build a dormer loft conversion - £41,307

Concrete foundations - £5,557

Convert a bungalow loft - £28,307

Convert a basement - £29,700